Light-front quark model analysis of heavy meson radiative decays

Abstract

We present the magnetic dipole($M1$) transitions $V\to P\gamma$ of various heavy-flavored mesons such as $(D,D^{\ast },D_s,D_s^{\ast },{\eta }_c,J/\psi )$ and $(B,B^{\ast },B_s,B_s^{\ast },{\eta }_b,{\rm Y})$ using the light-front quark model constrained by the variational principle for the QCD-motivated effective Hamiltonian. The weak decay constants of heavy mesons and the decay widths for $V\to P\gamma$ are calculated. The radiative decay for ${\rm Y}\to {\eta }_b\gamma$ process is found to be very helpful to determine the unmeasured mass of ${\eta }_b$. Our numerical results are overall in good agreement with the available experimental data as well as other theoretical model calculations.

6pages, 4figures; Talk given at 10th Asia Pacific Physics Conference (APPC10), Pohang, Korea, 21-24 Aug 2007

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• Combined study of the isospin-violating decay $D_s^{\ast }\to D_s{\pi }^0$ and radiative decay $D_s^{\ast }\to D_s\gamma$ with intermediate meson loops
• Three symmetry breakings in strong and radiative decays of strange heavy mesons